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C. BURGHER. FIRE ALARM TELEGRAPHIG REPEATBR.

No. 368,907. Patented Aug. Z3, 1887.

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FIRE ALARM TELBGRAPHIG REPEATBR`. No. 368,907.. Patented-A11 WJTNISEENVI TDH; @mq-#M/jw wm @7 u PESIRSA wwwLimomplrwr. washington, U. c.

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QBURGHER.' FIRE ALARMTBLBGRAPMG RB'PBATBRf No. 368,901. y Patented Aug.2s, 1887.

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UNITED STATES PATENT OEEICE.

CHARLES BURGHER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE AUTOMATICFIRE ALARM AND EXTINGUISHER COMPANY, (LIM- 1TED,) or NEW-YORK, N. Y.

FIRE-ALARM TELlGuRAPl-HC REPEATER.

SPECIFICATION forming part of Letters Patent No. 368,907, dated August23, 1887.

Application filed June 1-2, 1886. Serial No. 204,920. (No model.)

To all whom it may concern: y

Be it known that I, CHARLES BURGHER, of the city of Boston, in thecounty of Suffolk and State .of Massachusetts, have invented certain newand useful Improvementsin Fire- Alarm Telegraphic Repeaters, of whichthe following is a full, clear, and exact description, reference beinghad'to the accompanying drawings, forming part of this specification.

My invention. relates to the class of firealarm-telegraphy apparatusdesigned to repeat or retransmit from the central station over a mainalarm-circuit tire-alarm numbersignals, which are received and recordedat the central station by the signaling-box circuit or otherwise.

The objects of my invention are to provide a repeater having a series ofcircuit-closers and a corresponding series of controlling mechanismstherefor which are set and started by hand, whereby they then act insuccession upon each other to transmit or repeat the determinate set ofnumber-signals, and whereby, the determinate set having been oncetransmitted, the repeater automatically acts a number of times over tillchecked or run down.

,'Io the above purposes my invention consists in the certain novelcombinations and sub-combinations of the different features, ashereinafter fully described and claimed.

In the accompanying drawings, Figure 1 'represents my invention in adiagrammatic view illustrating the arrangements of the circuits andconstruction of the apparatus.' Fig. 2 represents an enlarged front viewof the series of four circuit-closing dials, with the trippingindex-hands and some of their adjuncts shown in full lines as disposedupon the outside of frame A, and with their individual releasing andactuating mechanisms shown in broken lines as within theframe. Fig. 3rep` resents the left-hand side view of Fig. 2, showing the frames A andF, with their contained mechanisms, mounted upon the base B. Fig. 4represents au edge view of a diametrical section of a circuit-closingdial, with its adjustable index-hand or tripper, and as keyed upon aportion-of a main arbor of a; clock-work.

In the said drawings like letters and numbers designateeorresponding'parts throughout.

I show the use of four circuit-closing dials, each having an adjustableradial index-hand or tripping device. Three of these dials are similarand the fourth is analogous to the others. The actuating devices andcontrolling mechanisms and their adjuncts are quite similarinconstruction and arrangement. Therefore a description of one of theserepeating mechanismsand adjuncts will suffice for all, and theirco-operation will readily be understood by -those familiar with the artto which they relate.

Referring to the drawings, the frame A is mounted on the base B andcontains a series of four of the ordinary cloclcworks, C; but the numberwill vary with the number of circuitclosing dials used, and they areeach actuated by a weight, E, the attached cable of which is wound upona drum, and thereby operates the main arbor e to rotate it.

Each clockwork is directly controlled in operation by theelectro-magnets M M2 M3 M, respectively. These magnets are each set in abracket, K, made fast upon a cross-bar of t-he frame A. .Themagnet-armature n. passes through an opening in bracket K, is pivotedAat i, and provided with a hooked extension, which engages with the flyZ, by which the motion of the clock-work is governed. The upper contact,c, is fixed upon an end of armature a', and coacts with a correspondinglower contact, o, normally in contact therewith and located upon thelower end of bracket K and provided with the ground O.

The gravity-detent h swings freely on its pivotal bearing, and whenunobstructed assumes an oblique dependent position, and at the lowerend, to one side, is provided with a shoulder, which obviously has twopositions against the lug t on the extension of armature a. Normally theshoulder on detent h rest-s in its first position with its side againstthe lug t, as shown, and the contact end of armature a being heavierthan the extended end holding the iiy Z, the extended and hooked endwill be elevated and will hold the fly, as s hown The limit ofoscillation of detent his between lug t and stop a.

The spring-acted trigger b tilts on its pivotal center, and its lowerend is struck by a stud, j, placed on the face of the wheel J, mountedon and revolving with the main arbore. The upper end of the trigger Z)strikes upon the lower end of the detent h and drives it against stop a,when the wheel J revolves in direction of the arrow and causes the studj to strike the lower end of trigger b, and from the opposite side inwhich the drawings show it normally. Vhen an electro-magnet attracts thearmature inthe detent h gravitates to its second and oblique position,with the lower end of its shoulder resting upon the upper face of lug t,and serves to hold the extended end of armature away from fly Z, whichthen releases the clock-work, which runs till stud]- strikes trigger b,as described, knocks the detent from off lug t, and causes armature a togravitate into normal position away from its magnet and to catch the ilyand stop the clock-work motion. These parts compose the releasingdevices for the actuating means.

The circuit-closing dials D DZ D3 are pre esely alike in construction,and each consists `of a metallic wheel, f, with a hub, d. rlhe disk 7cis of any suitable insulating material, and is ixnperforate, except atthe central eye, by means of which it is mounted upon hub d, with onebroad side against the outer face of wheel f, and is provided with tencavities, m, disposed upon its outer face symmetrically near itscircumference. The metallic annular plate P is provided with tenperforations, p, symmetrically situated, and from between which andnearer to one extend the peripheral radial teeth q, which are L-shaped.The plate P is placed concentrically upon the outer face of disk k, withits perforations p registering with cavities m, and is firmly heldthereon by means of teeth q hooking over the edge of disk k.

The metallic index-hand or tripping device X is iexible, and is fastenedupon the outer face of hub cZ by the screw s, about which it isturnable. Near the free end ot' hand X is ixed a knob, rv, and auoppositely-projeeting stud, o, designed to extend through anyperforation, p, into cavity m, as desired, by the manipulator takinghold of knob x, bending the hand out from the dial, then moving the handover the dial to the desired point, and then forcing the stud 'v intothe cavity m, in which position the hand will remain xed for furthermanipulation.

The circuit-closing dial D4 is analogous in construction to the others,as described, with the difference of having the teeth Q and perforationp one less each,and all located within the space of about one-third thecircumference of the plate l?, and with the extra tripstud Y extendingradially from the periphery of wheel f.

The dials are cach mounted upon the outer end of main arbor e by meansof the hub dhcing keyed thereto, and are situated to the outside offrame A.

The two metallic contact-brushes r, set on the insulating-block S,mounted on frame A, are adjusted to bear upon the outer face of plate P,which brushes past them when the dial is revolved. A connected pair ofthese brushes are employed with each dial-one as a guard against adefect in the other to insure constant contact.

Theinsulating-block Q is set above the dial and carries the metalliccontact-fingers u and w, the former arranged to make contact with teethq, the latter with the tripping indexhand X when the dial revolves. Thedial D has an extra contact-finger, z, arranged upon block Q, anddesigned to make contact with the trip-stud V, projecting from dial D,for the purpose hereinafter described.

The frame F contains the so-called interrupter, the oiiice of which willbe hereiuafter explained, and consists of an ordinary spring-actuatedclockwork, U, with its frame F. The operation of the clock-work isgoverned by a releasing device consisting of the electro-magnet M, thespring-retracted armaturen ofwhich holds by its extended end the iiy Z,while the other end of armature n maintains connection with contact o,having ground O. When armature u is attracted to its magnet M5, theclock-work is released and the trigger b takes under lug t an armature,n, and holds the armature away from fly Z until stud j on wheel Jstrikes upon the upper end ofthe trigger, which then lets go of the lugt, and the armature is retracted from its magnet into normal position bymeans of a spring, H.

The switch 31, situated below the series of circuit-closing dials, ispivoted at 32, and has the spring 33 projecting from the pivoted end andengaging with the pin 34. The switch 3l in the main is metallic, with aninsulated handle, from near which extends the springarm 35, which playsupon the contact-point 30 and rest-point 36. The point 38 is connectedwith ground 37. The switch may be placed in three positionsmrst, withits spring-arm 35 resting on rest-point36, when the switch will be openand out of contact; second, in the position of the full lines shown,when arm 35 rests on contact 30 and the switch is closed, third, in theposition of the broken lines, when the switch will be on ground-contact38 and grounded. lVhen the switch is moved into the third position ofthe broken lines, the spring 33 is strained by bearing on pin 34 andtends to resume the full-line position and break the ground.

The relay Y has a battery, Y', and ground Y2 for battery. The armatureof relay Y has a contact, y, which makes and breaks the loopalarm-circuit 5l, leading from poles of battery 55, and containing thebell-alarms 50, situated at different local points distant from theeentral station, which contains all the herein-described apparatus, withthe exception of the IOO IIO

main alarm-circuit 51 and its contained bellalarms. Y

The controlling-circuit 2O leads from battery Y2 over relay Y tocontact-fingers a, from where it passes to ground O, when thecircuitclosing dials revolve, by means of teeth q, plate l?, brushes rover armature n, upper and lower contacts, c and o, to ground O.Whenever this circuit finds ground O, relayYcloses, thereby makingalarm-circuit 51, whose bellalarms respond to said relay.

The magnets M2 M3 M4 M"J are each included in a local circuit leadingfrom ground R, battery 40, over said magnets to contact-nger w, fromwhere it finds ground G, over the tripping index-hand X, when thecircuit-closing dials revolve. When this circuit finds ground G,armature n is attracted, and the upper and lower contacts, c and o,respectively, are separated, thereby breaking ground O and releasing itsaccompanying actuating clock-work C.

rIhe initial magnet M' is in circuit 21, leading from ground R tobattery 40, overl said magnet, to switch 31, thence by point 38 toground 37, or by point 30 to the extra contactinger z, which coacts withthe terminal controlling mechanism of the terminal circuitclosing dialD", and from finger z when the dial revolves, by stud V,wheelf, hub d,to ground G.

The terminal circuit-closing dial D4 isv connected with the interrupterlocated in frame F by one part of controlling-circuit 20, leading fromground O to contact-o, over armature n, pivot i, frame F, to brushes r,and plate P to teethq, which close circuit over linger a, when dial D4revolves and transmits a signal over alarm-circuit, as before described.The magnet M5 is contained in the circuit leading from ground R, throughbattery 40, over said magnet to finger w, from where it finds ground G,by means of the tripping index-hand Xof dial Dt, when the dial revolves.When this circuit finds ground G over hand X of dial D, magnet M5attracts its armature n, thereby starting clock-work U and breakingground O by contact o bei-ng left open.

rlhe circuit-closing dials D', D2, and D have the resting-holes, formedas described, for the stud a: on the tripping index-hand X to rest in,numbered,.consecutively,.from O to 9, and are used to designate theassigned number-signal o'fa certain building located in thesignaling-box circuit connected with the central station. The dial D4has the resting-holes numbered similarly from 0 to 8, and is used todesignate a certain iioor located in the aforesaid building. A

The tripping index-hands X are normally fixed in the zero-holes, so thatno signal can be transmitted over the alarm-circuit, because one groundO is oft' of the controlling-circuit 20 as soon as the tripping-hand Xmakes contact with finger w, as before explained, and this willobviously be before the front tooth, g, will close on finger a to 'senda signal.

The tripping index-hand is set back of the tooth corresponding to thedeterminate numthe building by means of dials D', D2, and D3,

respectively, and the number-signal 3 for the floor by means of dial D?.The remainder of the apparatus is in normal condition. Let it besupposed that the above set of number-signals, 121 and 3, have beenrecorded at the central station by the signaling-box circuitconnectedtherewith, and are to be repeated upon alarm-circuit 51. Theoperator moves by hand the tripping-hand X of dial D' from the zeroholeto hole 1.' 'Likewise he sets dial D2 to hole 2, and dial D3 to hole 1,and dial Dl to hole 3, as shown. He then grounds the hand-switch 31 onpoint 38, and thereby energizes magnet M', which attracts its armatureand 4operates the releasing device of the actuating clockwork G, and soloperates the first of the series of controlling mechanisms. As thecircuitclosing dial D' revolves in direction of arrow the iirst tooth qthereof, on making contact with iinger u, closes the controlling-circuit2O by giving'it ground O, as described, and records l on relay Y, andthe responding bellalarms in circuit 51. Then next the trip- ICO pingindex-hand X of dial D' trips finger w,

and thereby gives ground G to magnet M", as described, and said magnetattracts its armature, thereby breaking ground O of controlling-circuit2O and preventing all the rest of teeth q on dial D' from recording onrelay Y,

as described. Dial D continues to revolve for one revolution, whenstudjstrikes trigger b and resets the releasing device to stop theclock-work C.

When magnet M'l attracts its armature, the connected releasing device isoperated and dial Dlz act-s to transmit its assigned numbersignal 2 uponthe alarm-circuit, in the manner described for dial D', likewise withdial D3. The dial D4 operates in a manner similar to that described forthe other dials, with the slight differencethat when its tripping-hand Xtrips iinger w to take ground O off of the controlling-circuit themagnet M5 is energized by giving it ground G, and starts the'interrupterin frame F, which makes one revolution of its main arbor e, when itcomes to rest 'before the revolving dial D4 has revolved its stud Varound to make contact with iinger z, so the switch having sprung backinto the full-line position the contact of stud V and iinger z willbring current from ground R, battery 40, over the initial magnet 'M', toswitch 31, therethrough t0 finger z, to stud Y, wheel f, to ground G,and thereby start anew the series ofdials to send over again thenumber-signals, as described. Theapparatus, having been thus set by handand then grounded, will transmit the set of number-signals once and thenact automatically to repeat them over again until the actuating devicesrun down or the apparatus is checked by opening switch 3l. Of course anynumber of alarmcireuits may be placed under the control ot' relay Y forthel number-signals to be repeated or transmitted over, or the relay Ymay be arranged to 0perate upon several other relays, each acting uponan alarmcircuit.

Having thus described my invention, I claim as new and desire to secureby Letters Patentl, In combination, an alarm-circuit, a relay operatingupon said circuit, a controlling-circuit including said relay, a seriesof circuitclosers, substantially as described, for closing thecontrolling-circuit and transmitting the determinate number-signal overthe alarm-circuit, and controlling mechanisms therefor predcterminatel yset, the controlling mechanisms acting cach in turn upon the operationof the initial mechanism to start the next succeeding mechanism and tooperate in succession the said circuitcloscrs,whereby saidcircuit-closers actsuccessively upon said controlling-circuit.

2. In combination, an alarm-circuit, a relay operating upon saidcircuit, a controlling-circuit ineludingsaid relay, a seriesofcircuitclosers, substantially as described, for closing thecontrolling-circuit and transmitting the determinate numbersignal overthe alarm-circuit, a series ot' controlling mechanisms and trippingdevices therefor p rcdeterminatcly set, the controlling mechanisms eachprovided with a local circuit containing an electro-magnet for breakingthe controlling-circuit, and the tripping devices located one in each ofthe said local circuits for making and breaking the same, whereby saidcontrolling mechanisms automatically act upon each other scrfiaii'm, andwhereby said circuit-closers act successively upon saidcontrolling-circuit.

3. In combination, an alarm-circuit, a relay operating upon saidcircuit, a controlling-cir` cuit including said relay, a series ofcircuitclosers, substantially as described, for closing thecontrolling-circuit and transmitting the number signal overthealarm-circuit, and aetuating and releasing and tripping devicestherefor, said tripping devices each independently and previouslyadjusted, whereby the effect of an acting fellow circuit-closer isdestroyed, and whereby the next following releasing device is started,and so on succes` sively.

4. In a signal-transmitting system, the combination, as hercinbefore setforth, of an alarm-circuit and a relay acting thereupon, acontrolling-circuit including the relay, a series of circuit-closets,substantially as dcscribed, for closing the controlling-circuit andtransmitting the num ber-signal over the alarmcircuit, controllingmechanism predeterminately set for the circuit-closers, cach controlling mechanism provided with a local circuit containing anelectro-magnet, which acts to break the controlling-circuit and tooperate the next succeeding circuit-closer and controlling mechanismsefri'cti'm, the terminal controlling mechanism included in-the localcircuit ofthe initial mechanism, whereby the Operation of the saidterminal may act to restart the initial mechanism, substantially as andfor the purpose herein described.

5. In asignal-transmitting system, the combination, as liereinbeforc setforth, of an alarmcircuit and a relay acting thereupon, acontrolling-circuit including the relay, a series of circuit-closers forclosing the controlling-eircuit and transmitting the number-signal overthe alarm-circuit, and a series of controlling mechanismspredctcrminately Set for the Crcuit-closers, each said mechanismprovided with a local circuit containing an electro-magnet acting tobreak thecontrolling-circuit and to operate the next succeedingcircuit-closer and mechanism scriaiim, the terminal mechanism of theseries included in the local circuit ofthe initial mechanism, and a handdevice inthe latter local circuit for governing the initial magnet byhand, substantially as and for the purpose herein described.

6. In asignal-transmitting system, the combination, as hereinbelore setforth, of an alarm-circuit and a relay acting thereupon, acontrolling-circuit including the relay, a Scries of circuitclosers forclosing the controlling-circuit and transmitting the lininbcr-signalover the alarm-circuit, and a series of cont-rolling mechanismspredeterminately set for said circuit-closers, each controllingmechanism provided with a local circuit containing an electro-magnetacting to break the controlling-circuit and to operate the nextsucceeding circuitcloscr and mechanism in turn, an interrupter,substantially as described, included in the controlling-circuit andprovided with an electro-magnet for breaking and making thecontrolling-circuit, the local circuit of the terminal controllingmechanism including the magnet of the interrupter, the terminalcontrolling mechanism included in the local circuit of the initialmechanism, substantially as and for the purpose herein described. t

7. In combination, an alarm-circuit, a relay operating upon saidcircuit, a controllingcircuit including said relay, a series ofreleasing electro-magnets, a series of circuit-closers and controllingmechanisms therefor predeterminatcl y set, a circuit including theinitial magnet and the terminal mechanism of said respective series, anda switch, said switch provided with an adjacent ground and contact,whereby said initial magnet is governed directly and the succeedingmagnets indirectly, and whereby said terminal mechanism governs directlysaid initial magnet.

8. In a system for transmitting signals, the

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combination, as hcreinbet'ore set forth, of an alarm-circuit and a relayacting thereupon, a controllingcircuit including the relay, and a seriesof rotating circuit-closing dials for closing the controlling-circuitand transmitting the number-signal over the alarm-circuit, each dialhaving a controlling mechanism provided with a local circuit containingan electro-magnet and predeterminately set to close the said localcircuit and to open the controlling-circuit, thereby preventing thecircuit closer from further transmitting and starting the nextsucceeding circuit-closer and mechanism, an interrupter included in thecontrol? mechanism to restart the latter, substantially as and for thepurpose herein described.

9. In a system for transmitting signals, the combination, ashereinbefore set forth, of an alarm-circuit and the relay Y, actingthereupon, the controlling-'circuit 20, includingthe said relay and aseries of electro-magnets, M M2 M3 M4t M5, also included therein,aseries of circuit-closing dials, DD2 D3 D, for closing .thecontrolling-circuits, and having -motors therefor governed,respectively, by the armatures n of the said magnets, and the armaturesn, preservingthe continuity of the controllingcircuit, each of the saidmagnets provided with a local circuit having the tripping indexhands Xcontained therein for making and breaking the said circuits containingthem, means intermediate the controlling mechan; isms of the terminaldial D4 and the magnet M', whereby the latter may be actuated to restartthe series of dials and their respective mechanisms.

CHARLES BURGHER.

Witnesses:

M. F. BLIGH, J. A. MILLER, Tr.

